Float-tank mechanism for carbureters.



W. G. CARTER. FLOAT TANK MECHANIQM FOR GARBURETBRS.

APYLIOATION FILED APR. 24, 1911.

Patented Mar. 12, 1912.

wiLL'Iam; cfoaacrn'a, ou -s r. LOUIS, MIssoUnI;

IE'LOA1'-TA1\T'K MECHANISM non CARBURETERS.

Specification of Letters Patent. Patented M31312, 1912.

Application filed Apr-i124, 1911. Serial No.'623,Q17.

To allwhofli it may concern:

Be it known that 1, WILLIAM C. CARTER, a citizen of the United States, residing at St. Louis, Missouri, have invented a certain flew and useful Improvement in Float-Tank l\lechanism for Carbureters, of which the following. is-afull, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to carburetors, and particularly to the mechanismnsed in the float tahkfifor controlling the valve which regplates the supply of fuel into the float tan One object of my invention is to provide a mechanism of the character referred to which is so constructed that the fuel level in the float tank can be varied easily. And another object is to provide a float tank mechanism that comprises a needle valve'for controlling the supply of liquid fuel into .said float tank, and means of novel construction for varying the position of the float with reference to said valve so as to changethe fuel level.

Other objects and desirable features of my invention will be hereinafter pointed out. t

Figure 1 is a front elevational view of a carbureter provided with a float tank constructed in accordance with my invention; Fig. 2 is a vertical sectional view of 'Fig. 1; and Fig. 3 is a horizontal sectional view taken on approximately the line, 3?-3 of Referring to the drawings which 'illustrate the preferred form of my invention. A designates a substantially dome-shaped shell that forms the top and side walls of the fioattank, and 1 designates a member which forms the bottom of the float tank, the shell A being preferably formed from glass so asto enable the mechanism iilside of the float tank to be SEW- ;Mii 11 will be obvious, however, that the shell A. could be formed from metal or any other suitable material, andthereforel do not wish it to be. understood tlltlll'lll) invention is limited to a glassfioat tank oi a lloat tank formed of transparent material. A fuel-supply pipe 2 leads into the bottom of the float tank, and in the preferred form of my invention as herein shown, said supply pipe is connected toa valve seat member 3 arranged inside ofthe float tank and. provided'with a re 'duced screw-threaded portion that projects through an opening in the bottom of the float tank and on which a nut 4 is mounted shown in, Fig. 2. A vertically disposed needlevalve 5, preferably a gravity-operated valve, cotnerates with a' port in the valve seat mem er to regulate the How of fuelinto therfloattank, and a vertically disposed guide 6 is provided for holding said valve in position and also to hold the 1101- low ,il'oiuf 7 in position, said guide 6 being substantially tubular-shaped and formed integral with the valve seat member 3, as shown in Fig. 2. The means which transfers the movement of the float 7 to the needle valve 5. consists of apair of levers S'pivotally connected to the lower end portion of the guide 6 and provided at their inner ends with toothed segments which lie in a cutout portion in the guide 6 and engage a worm 9 on the needle valve 5. When the fuel in-the float tank falls below the n01- mal fuel level, indicated bythe dotted line X, the float 7 will move downwardly and thus exert sulllcient pressure on the outer ends of the levers 8 to move the needle valve upwardly so as to permit suilicient fuel to liowinto the float tank to reestablish the normal level. is provided at its upper end with a reduced non-circular shank 5* which passes loosely through an opening of corresponding shape an cross section that is formed in a not or needle valve, thus changing the normal position of the lloat 7 with reference to the needle valve and mnsequcutly changing the.

fuel level in the float tank. The guide 6 projects upwardly through an opening in the top wall or dome of the member A, and a cap-piece 11.. which is screwed onto the upper end portion of the guide (3, closes said opening and also clamps the member A tightly against the member 1 which forms the bottom of the float tank, a packing 0: of any suitable material being arranged. between the lower edge of the member Aand the supporting member 1 so as to form a tight joint between said parts. Vent holes are formed in the upper end portion of The needle valve 5' ate portion of the needle valve hcing preff large enough to permit a suflicient quhntity '25- tion with a carbureter of the type illustrated Serial No. 623,016 filed April 24, 1911, '1 do Having thus descrihcglmy invention, what I claim as new and desire to secure by Lettiers Patent is:

'1. In a float tank avidl mounted device for transferring movethe guidcfl, and thcopcxing in the menfl ber 10 which rcceivcs the reduced extensionor shank 5 of the needle valve, is made of air to enter the float tank, the intermedierably made non-circular shape in cross sectionso that air can pass down through the guide 6. The shank 5 of the needle valve projects a slight distance above the adj usting member 10 so that the needle valve can be manually-operated whenever it is desired to flood the carbureter, and suitable means is provided for holding the member 10 in adjusted position, the means herein shown consisting'of a spring-pressed plunger 13 carried by the cap-piece l1 and coiiperating with teeth or serrations in the edge of the adjusting member 10. v

A float tank and valve-operating mecha nism of the kind herein shown can be used with various kinds of carbureters, and w hile I have herein shown it as being in corghuim and described in my pending application not wish it to be understood that i t islirdi'tcd to any articular type of carburetor. Nor do I, wis it to be understood that myinventionu'is' limited to a structure in which .a gravity-operated needle valve is employed for controlling the supply of the fuel to the float tank for other types of needle valves could be'. used if desired without departing from the spirit of my invention. The carbureter herein shown is provided with a vertically disposed fuel tube 14 whose lower end communicates with a fuel duct 15 that leads from the float tank, and said fuel tube is provided adjacent its upper end with a jet 16 through which the liquid fuel escapes laterally so that it will be vaporized bythc air traveling throu h the passageway formed in the hollow mam r B.

j The main advantage of afloat tank and vhlve-operating mechanism of the hind here in shown is that the operator can change the fuel level easily b simply turning the memher 10, the partoi the carburetor being preferably provided with a' groove 17 or" other suitable device for indicating the hori zontal position of the fuel jet 16 so as to aid the o crater in determining the fuel level in the cat tank. ,And another advantage of such a mechanism when c ui'pped with a gravity-operated needle va ve is that no springs are emiiloyed for holding the fuelcontrolling valve seatcdi mechanism for carbureters, a ncedlc'valvefor controlling the supplv of fuel to the float tank, a float, a PlV- valve vso as to change the reters, a needle valve for controlling the supply of fuel to the float tank, a float, levers mounted on stationary fulcrums for transferring the movements of the float to said needle valve, coiiperating means on said levers and needle valve for changing the normal position of said levers relatively to said valve when said valve is turned so as to vs the float level, and a device arranged outsi e of the float tank-for turning the needles 3. In a float .tank mechanism for carburetcrs, a rotatable needle valve that controls the supply of liquid fuel tothe float tank, a

float, a pivotally mounted member for trans- Earring the movements of said float to said needle valve, and a worm on said needle valve that coo crates vwith a toothed segment on said evice. i

4. In a float tank mechanism for carbureters, a needle valve provided with a worm gear,* levers mounted on stationary fulcrums and provided with-toothed sectors which oooperate with said worm gear, a float which is adapted topress upon the ireeencls of said levers, and means for turning said osition of said levers with reference to sai valve and thus vary the fuel level.

5. In a' float tank mechanism for carbu- 'retcrs, a fuel-controlling valve which can-be rotated, a guide through which said valve passes, a, pivotally mounted device carried by said guide, a float which bears on one end of said device, and cooperating means on the opposite end of said device and on said valve which causes said device to be shifted relatively to said valve when the valve is turned. I y l 6. In a floattank mechanism for carburetcrs, a needle valve for controlling the supply of liquid fuel to the float tank, a guide through which said valve passes, a worm gear on said valve, levers carried by said guide and provided with toothed portions which cooperate with the worm gear on said valve, ,a float which bears upon the outer ends of said levers, an adjusting device rotatahly mounted in said guide, and a noncirculacshank on said valve which passes through anopcning of corresponding shape in said adjusting device. r

7. In a float tank mechanism for carburetcrs, a needle valve for controlling the supply of liquid fuel to the float tank, a worm tat-ably mounted in said guide,,a non-circle lar shank on said valve which passes through an opening of corresponding shape in said adjusting device, and means for locking said adjusting device in position.

8. In a float tank mechanism for carbureters, a needle valve, a vertically disposed guide in which said valve is arranged, levers pivotally connected to said guide, and provided with toothed sectors Wlrichcooperate with a wornron said valve, a float surrounding saiolguide and cooperatingxwith said levers to raise and lower the valve, an ad justing device rotatablymounted. in the upper end of said guide for turning said needle valve so as to change the position, of

the levers with reference to said valve, and vent ports in said guide.

9. in a float tank mechanism for carbureters, a float tank having a transparent portion which permits the fuel in said tank to be seen, a freely movable needle valve for controlling the supply of fuel to said float tank, a float in said tank, a pivotally mounted device for transferring movement from said float to said needle valve, and means for causing said pivotally mounted device to move relatively to said needle valve so as to change the fuel level when said needle valve guide, a float arranged on said guide, and

levers carried by said guide for transferring movement from said float to said needle valve. l

11. A, float tank for carbureters comprising a member that forms the bottom of the float tank, a substantially dome-shaped shell mounted on said member that forms the side and. top walls of the float tank, a guide pro: jccting upwardly from said bottom member and passing through an opening in the top of said shell, a cappiece screwed onto the upper end of said guide and operating to -clamp said shell liri'nly against said bottom member, a needle valve arranged in said guide, a float arranged on said guide, levers carried by said guide fortransferring movement from said. floatto said needle valve, toothed sectors on the inner ends of said levers, a. worm on said needle valve which cooperates with said toothed sectors, and an adjusting device rotatably mounted in the upper end of said guide for turning said needle valve so as to change the position of the levers relatively to said guide.

12. A float tank for carburetors comprising a member that forms the bottom-of the float tank, a valve seat member detachably connected to said bottom member and provided with a port which communicates with a fuel-supply pipe, a tubular-shaped guide projecting upwardly from said valve seat member, a needle valve arranged in said guide for controlling the flow of fuel through said port, a worm on said valve, a dome-shaped shell formed of transparent material that forms the side and top walls of the float tank, said shell having an opening through which the upper end of said guide. passes, a cup-piece screwed onto the upper end of said guide for clamping said shell tightly against said bottom member, a float in said tank that surrounds said guide,

, levers pivotally connected to said guide and provided at their inner ends with toothed sectors which cooperate with the Worm on said needle valve, and an adjusting device rotatably mounted in the upper end of said guide for turning said needle valve so as to change the position of said levers and thus vary the fuel level.

13. In a float tank mechanism for carbureter s, a needle valve for controlling the supply of fuel to the float tank, said valve being capable of being rotated, a float, a pivotally mounted device operated by the float for actuating said valve, means arranged outside of the float tank for rotating the needle valve, and means for causing said device to move relatively to the valve so as to vary the fuel level whenever said valve is rotated.

14. In a float.tank mechanism for carbureters, a needle valve for controlling the supply of fuel to the float tank, a guide in which said valve is arranged, a float, a pivotally mounted device on said guide which is adapted to be actuated by the float, cotiperating teeth on said valve anddevice for-transmitting the movements of said device tosaid needle, and means independent of the float for adjusting said device relatively to said needle valve.

In tcstimony-Whereof I hereunto aliix my signaturein the presence of two'witnesses, this twentieth day of April 1911.

WILLIAM C. CARTER. Witnesses:

W. L. CHURCH, Gnonen BAKEWELL. 

